Clean Chemistry, Inc. vs. Enviro Tech Chemical Services, Inc. et al.

Explore the PTAB proceeding IPR2025-01472 filed by Clean Chemistry, Inc. on 2025-09-08. This includes filing dates, application numbers, tech centers, patent numbers, and current case status.

Proceeding Overview

Proceeding Number

IPR2025-01472

Filing Date

2025-09-08

Accorded Filing Date

2025-09-08

Institution Decision Date

2026-02-18

Last Modified Date

2026-03-24

Proceeding Type

IPR

Termination Date

2026-02-18

Trial Status

Discretionary Denial

Parties & Counsel

Petitioner

Clean Chemistry, Inc.

Represented By

Knauss, Danielet al

Patent Owner / Respondent

Enviro Tech Chemical Services, Inc. et al.

Represented By

HALSEY, ANNAet al

Tribunal & Venue

Tribunal

Patent Trial and Appeal Board (USPTO)

Technology Center

TC 1600 - Biotechnology & Organic Chemistry

Patent Information

1 Patent Involved

Respondent Application Number 13065553

Respondent Patent Number 8546449

External Links

Espacenet

Google Patents

Respondent Inventor Michael S. Harvey et al

Respondent Tech Center TC 1600 - Biotechnology & Organic Chemistry

Address and Attorney/Agent Information

1 Registered Practitioner

Power of Attorney & Correspondence

Firm / Entity Name AUDREY A. MILLEMANN - WEINTRAUB GENSHLEA CHEDIAK

Customer Number —

Address 11TH FLOOR, 400 CAPITOL MALL, SACRAMENTO, CA, 95814, UNITED STATES

Attorney / Agent Information

Reg #	Name	Phone
44942	Audrey Millemann	916-558-6033

Proceeding Documents

Notice: refund approved NOTICE

2026-03-24 FILING PARTY: BOARD

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Petitioner's Request for Refund of Post-Institution Fees OTHER

2026-03-23 FILING PARTY: PETITIONER

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Director Discretionary Decision: Deny RESPONSE

2026-02-18 FILING PARTY: BOARD

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Director Discretionary Decision: Refer RESPONSE

2026-01-09 FILING PARTY: BOARD

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ORDER Granting Patent Owner’s Motion for Admission Pro Hac Vice of Jennifer R. Sandlin 37 C.F.R. § 42.10 ORDER

2025-12-31 FILING PARTY: BOARD

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Clean Chemistry, Inc. vs. Enviro Tech Chemical Services, Inc. et al.

Proceeding Overview

Parties & Counsel

Petitioner

Clean Chemistry, Inc.

Represented By

Patent Owner / Respondent

Enviro Tech Chemical Services, Inc. et al.

Represented By

Tribunal & Venue

Patent Information

Address and Attorney/Agent Information

Power of Attorney & Correspondence

Attorney / Agent Information

Proceeding Documents

Notice: refund approved NOTICE

Petitioner's Request for Refund of Post-Institution Fees OTHER

Director Discretionary Decision: Deny RESPONSE

Director Discretionary Decision: Refer RESPONSE

ORDER Granting Patent Owner’s Motion for Admission Pro Hac Vice of Jennifer R. Sandlin 37 C.F.R. § 42.10 ORDER

Patent Owner's Preliminary Response POPR

Environmental Assessment for Food Contact Notification FCN 23352 (Feb. 1, 2024) Exhibit

Chapter 7: Peracetic Acid Acute Exposure Guideline Levels in Acute Exposure Guideline Levels for Selected Airborne Chemicals (2010) Exhibit

Food Safety, World Health Organization (Oct. 4, 2024) Exhibit

Plaintiff Enviro Tech Chemical Services, Inc.’s Objections and Responses to Defendant’s First Set of Requests for Admissions (Nos. 1–2) Exhibit

Envirotech Chemical Services, Inc.’s Initial Infringement Contentions, dated March 4, 2025 Exhibit

Exhibit 2022 - Whiteker Declaration - Motivation to Combine Exhibit

Exhibit 2019 - Whiteker DCT Declaration Exhibit

EP2688399 Prosecution History Exhibit

Written Opinion for PCT Application No. PCT/US2011/000539 Exhibit

Western District of Texas Median Time to Trial Report Exhibit

Petitioner's Opposition to Patent Owner's Discretionary Denial Brief RESPONSE

Judge Albright’s Average Time to Trial Report Exhibit

PCT Application No. PCT/US2011/000539 Exhibit

Judge Albright Trial Docket Exhibit

Exhibit 2021 - Klibanov DCT Declaration Exhibit

U.S. Patent No. 7,919,122 Exhibit

Exhibit 2020 - US7919122 - Okano 1 Exhibit

Exhibit 2016 - Clean Chemistry Google Patent Search Exhibit

Exhibit 2014 - WO2024108086 Exhibit

Exhibit 2004 - Scheduling Order Exhibit

Exhibit 2007 - March 26, 2025 PTAB Memo Exhibit

Exhibit 2013 - Wiseman LinkedIn Exhibit

Exhibit 2012 - Donabed Declaration Exhibit

Exhibit 2005 - Claim Construction Order Exhibit

Exhibit 2018 - FAQs for Interim Processes Exhibit

Exhibit 2010 - First Amended Preliminary Invalidity Contentions Exhibit

Exhibit 2008 - Docket Navigator - Stay Pending IPR Exhibit

Exhibit 2011 - Bankosky LinkedIn Exhibit

Exhibit 2015 - WO2024238884 Exhibit

Exhibit 2009 - Docket Navigator - Time to Trial Exhibit

Exhibit 2017 - Interim Director Discretionary Process Exhibit

Exhibit 2003 - Complaint and Exhibits Exhibit

Exhibit 2006 - March 24, 2025 PTAB Memo Exhibit

Discretionary Denial Brief RESPONSE

Motion for PHV Admission of Jennifer Sandlin MOTION

Exhibit 2002 - PHV Declaration of Jennifer Sandlin Exhibit

Notice: Updated Mandatory Notices NOTICE

Notice: Power of Attorney NOTICE

PHV Declaration of Ann Fort Exhibit

Notice of Intent to Designate Ann Fort as Back-Up Counsel NOTICE

Notice: Mandatory Notice NOTICE

Notice: Power of Attorney NOTICE

Notice filing date accorded to Petition NOTICE

US 3,432,546 ("Oringer") Exhibit

Luyben, Chemical Reactor Design and Control (2007) ("Luyben") Exhibit

US 7,271,137 ("Tucker") Exhibit

Hill, Chemical Engineering Kinetics & Reactor Design (1977) ("Hill") Exhibit

Prosecution History of US Patent No. 8,546,449 Exhibit

US Pat. Appl. Publ. No. US 2007/0082832 to DiCosimo et al. ("DiCosimo") Exhibit

Petition: as filed PETITION

Patent Owner's Executed Summons, Enviro Tech v. Clean Chem Exhibit

Curriculum Vitae of Alexander M. Klibanov, Ph.D. Exhibit

Notice: Power of Attorney NOTICE

US Pat. Appl. Publ. No. US 2009/0043123 to Copenhafer et al. ("Copenhafer") Exhibit

U.S. Patent No. 8,546,449 Exhibit

Declaration of Alexander M. Klibanov, Ph.D. Exhibit

US Pat. Appl. Publ No US 2009/0175956 to Buschmann et al ("Buschmann '956") Exhibit

Patent Owner's Complaint, Enviro Tech v. Clean Chem Exhibit

WO 2001/046519 ("Withenshaw") Exhibit